They get about 5" and are extremely active. A 20g display area just isn't enough space for an active puffer. I'm not entirely sure but I think figure 8's are smaller and can live in full marine as well. I'm not sure on that thoughI'm not so worried about fluctuations - I already have a sump I can hook up, 75 gallon skimmer and an Eheim I can hook up, just don't know if it will all fit or if the current will be too much for the awkward swimming little guy. My live rock has been in freshwater for WAY too long to still be live so I'll have to take a huge amount of time preparing the tank for salt anyway so I'll just start brackish and slowly acclimate (though I'm sure the LFS keeps them in FW). All things considered it should equal out to at least 30 gallons, I don't think they get big enough that space would be an issue in a 20? Is a weekly feeding of snails enough or do they require more?
I'm in Ohio, wish I were closer to Cali after this winter though lol
Thanks for all the advice again guys!
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